Best Radon Testing & Mitigation in St. John's

About Radon in St. John's, Newfoundland and Labrador

Last updated: March 2026

St. John's is served by C-NRPP certified radon professionals listed on RadonFinder.ca. Newfoundland and Labrador has above-average radon risk driven by the province's uranium-rich Precambrian geology. The Avalon Peninsula — home to St. John's and a large share of the province's population — sits over ancient gneiss and granite that produces elevated soil radon. Homes on the island portion of the province are often built over bedrock with minimal soil buffer, and the province's cold, windy climate means structures are well-sealed during the long heating season. Health Canada surveys show a meaningful portion of NL homes exceed the guideline.

Typical Mitigation Cost in Newfoundland and Labrador

$2,000–$3,500

Above national average

Higher costs reflect limited contractor availability outside St. John's and the island's older housing stock, which often requires more sealing work.

  • •Bedrock proximity — many NL homes are built over or very close to exposed rock
  • •Older construction with rubble or block foundations common in St. John's
  • •Limited contractor availability outside of the Avalon Peninsula
  • •Complex pipe routing in row houses and older attached homes
  • •Weather considerations during installation in coastal communities

Showing 1–2 of 2 professionals in St. John's

Pinchin Ltd.

St. John's, NL
Basic
5.0(4)Google
Testing
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Shane Hickey

St. John's, NL
Basic
Testing
CallView Profile

Frequently Asked Questions: Radon in St. John's

RadonFinder.ca lists C-NRPP certified radon testing and mitigation professionals serving St. John's, Newfoundland and Labrador. Browse the directory above to compare professionals by services offered, certifications, and reviews.
Most homeowners in Newfoundland and Labrador pay between $2,000 and $3,500 for a complete radon mitigation system. Actual cost depends on your foundation type, home size, and the complexity of the installation. Request quotes from multiple professionals to compare.
St. John's follows Health Canada’s national guideline of 200 Bq/m³. If your home tests above this level, Health Canada recommends taking action to reduce radon — within two years for levels between 200 and 600 Bq/m³, and within one year if above 600 Bq/m³.
Yes. Health Canada recommends testing every home in Canada, regardless of age, construction type, or location. Radon levels vary from house to house — even neighbouring homes can have very different readings. A long-term test of at least 91 days during the heating season is the most reliable method.
The most common system is active sub-slab depressurization (ASD). A certified professional installs a pipe through your foundation slab connected to a fan that draws radon from beneath the home and vents it safely above the roofline. Installation typically takes one day.

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Radon Resources for St. John's

Tools and guides to help you understand radon risk and take action.

Check your radon risk
Estimate your risk based on province, home age, and foundation type.
Understand your test results
Learn what Bq/m³ means and when action is required.
DIY radon test kits
Compare test kit options starting from $10.
Radon guides & articles
In-depth guides on testing, mitigation, and health risk.
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Radon FAQ
Answers to the most common questions about radon.